<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>PHP 5.5.x 中的变更</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="migration55.html">从 PHP 5.4.x 迁移到 PHP 5.5.x</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="migration55.incompatible.html">不向后兼容的变更</a></div>
 <div class="up"><a href="migration55.html">从 PHP 5.4.x 迁移到 PHP 5.5.x</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="migration55.changes" class="sect1">
  <h2 class="title">PHP 5.5.x 中的变更</h2>
  <p class="simpara">
   PHP 5.5.x 中的大多数改进对现有代码不会有影响。 在生产环境中切换 PHP 版本前应考虑 <a href="migration55.incompatible.html" class="link">少许不兼容</a> 和 <a href="migration55.new-features.html" class="link">新特性</a>，并严格测试代码。
  </p>
  <p class="simpara">
   想要从一个较老的 PHP 版本升级系统，可使用下列相关文档：
  </p>
  <ul class="itemizedlist">
   <li class="listitem">
    <span class="simpara">
     <a href="migration54.html" class="link">PHP 5.4.x 升级说明</a>.
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="migration53.html" class="link">PHP 5.3.x 升级说明</a>.
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="migration52.html" class="link">PHP 5.2.x 升级说明</a>.
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="migration51.html" class="link">PHP 5.1.x 升级说明</a>.
    </span>
   </li>
   <li class="listitem">
    <span class="simpara">
     <a href="migration5.html" class="link">从 PHP 4 迁移到 PHP 5</a>.
    </span>
   </li>
  </ul>
 </div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="migration55.html">从 PHP 5.4.x 迁移到 PHP 5.5.x</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="migration55.incompatible.html">不向后兼容的变更</a></div>
 <div class="up"><a href="migration55.html">从 PHP 5.4.x 迁移到 PHP 5.5.x</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
